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2. The method as in claim 1 , wherein the first and second UL clients and the first and second DL clients work in a half duplex mode, and the AP works in a full duplex mode.
In a wireless communication system with an access point (AP), the first and second uplink (UL) clients and the first and second downlink (DL) clients operate in half-duplex mode (cannot transmit and receive simultaneously), while the AP operates in full-duplex mode (can transmit and receive simultaneously). The AP receives a composite channel matrix from a DL client device to perform interference cancellation. This channel matrix comprises a first channel matrix and a second channel matrix, both estimated by the DL client.
3. The method as in claim 1 , wherein the first UL-DL CSI comprises: H 11 between the first DL client device and the first UL client device and H 12 between the first DL client device and the second UL client device, and wherein the second UL-DL CSI comprises: H 21 between the second DL client device and the first UL client device and H 22 between the second DL client device and the second UL client device.
In a wireless communication system with an access point (AP), the AP receives a composite channel matrix from a DL client device to perform interference cancellation. This configuration involves two types of channel state information (CSI): First, the UL-DL CSI includes H11 (the channel between the first DL client device and the first UL client device) and H12 (the channel between the first DL client device and the second UL client device). Second, the UL-DL CSI includes H21 (the channel between the second DL client device and the first UL client device) and H22 (the channel between the second DL client device and the second UL client device).
4. The method as in claim 1 , wherein the first UL-DL CSI comprises a first composite channel matrix, and the second UL-DL CSI comprises a second composite channel matrix.
In a wireless communication system with an access point (AP), the AP receives a composite channel matrix from a DL client device to perform interference cancellation. The first uplink-downlink (UL-DL) channel state information (CSI) comprises a first composite channel matrix, and the second UL-DL CSI comprises a second composite channel matrix.
5. The method as in claim 4 , wherein the first composite channel matrix comprises H 12 −1 H 11 , where H 11 is a channel matrix between the first DL client device and the first UL client device and H 12 is a channel matrix between the first DL client device and the second UL client device, and wherein the second composite channel matrix comprises H 21 −1 H 22 , where H 21 is a channel matrix between the second DL client device and the first UL client device and H 22 is a channel matrix between the second DL client device and the second UL client device.
In a wireless communication system with an access point (AP), the AP receives a composite channel matrix from a DL client device to perform interference cancellation. Here, the first composite channel matrix (part of uplink-downlink CSI) is calculated as H12^-1 * H11, where H11 is the channel matrix between the first DL client device and the first UL client device, and H12 is the channel matrix between the first DL client device and the second UL client device. Similarly, the second composite channel matrix is calculated as H21^-1 * H22, where H21 is the channel matrix between the second DL client device and the first UL client device, and H22 is the channel matrix between the second DL client device and the second UL client device.
6. The method as in claim 1 , further comprising: determining precoder V 0 for the AP, first precoder V 1 for the first UL client device, second precoder V 2 for the second UL client device, receive filter U 0 for the AP, first receive filter U 1 for the first DL client device, and second receive filter U 2 for the second DL client device.
In a wireless communication system with an access point (AP), the AP receives a composite channel matrix from a DL client device to perform interference cancellation. The system determines a precoder V0 for the AP, a first precoder V1 for the first UL client device, a second precoder V2 for the second UL client device, a receive filter U0 for the AP, a first receive filter U1 for the first DL client device, and a second receive filter U2 for the second DL client device.
7. The method as in claim 6 , wherein a decision is made according to channels H 01 U and H 02 U , feedback DL CSI H 10 D and feedback DL CSI H 20 D , and first UL-DL CSI and second UL-DL CSI.
In a wireless communication system with an access point (AP), the AP receives a composite channel matrix from a DL client device to perform interference cancellation. When determining precoders and filters for interference cancellation, the decision process considers the following: channels H01U and H02U, downlink (DL) channel state information (CSI) H10D and H20D fed back from the DL clients, and the first and second uplink-downlink (UL-DL) CSI.
8. The method as in claim 1 , further comprising: transmitting second precoder V 2 to the second UL client device.
In a wireless communication system with an access point (AP), the AP receives a composite channel matrix from a DL client device to perform interference cancellation. As part of the process, the access point transmits a second precoder V2 to the second uplink (UL) client device.
9. The method as in claim 8 , wherein the first and second DL client devices receive first precoder V 1 and second precoder V 2 , and wherein the first and second DL client devices determine first receive filter U 1 for the first DL client device and second receive filter U 2 for the second DL client device, respectively, by using first precoder V 1 and second precoder V 2 .
In a wireless communication system with an access point (AP), the AP receives a composite channel matrix from a DL client device to perform interference cancellation. The first and second downlink (DL) client devices receive the first precoder V1 and the second precoder V2, respectively. They then use these precoders to determine their respective receive filters: the first DL client determines receive filter U1, and the second DL client determines receive filter U2.
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November 7, 2017
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